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Effects of Cooling Rate and Component on the Microstructure and Mechanical Properties of Mg–Zn–Y Alloys

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Acta Metallurgica Sinica (English Letters) Aims and scope

Abstract

The microstructure and mechanical properties of Mg–6Zn–1Y and Mg–6Zn–3Y (wt%) alloys under different cooling rates were investigated. The results show that the second dendrite arm spacing (SDAS) of Mg–6Zn–1Y and Mg–6Zn–3Y is reduced by 32 and 30% with increasing cooling rates (R c) from 10.2 to 23 K/s, which can be predicted using a empirical model of \( {\text{SDAS}} = 68R_{\text{c}}^{ - 0.45} \) and \( {\text{SDAS}} = 73R_{\text{c}}^{ - 0.45} \), respectively. The compressive strength of both alloys increases with increasing the cooling rate, which is attributed to the increase of volume fraction (V f) of secondary phases under high cooling rate. The interaction of the cooling rate and component with SDAS has been theoretically analyzed using interdependence theory.

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Acknowledgments

This work was financially supported by the National Natural Science Foundation of China (NO. 51464034), the Cooperation and Exchanges of Nanchang City (2012-DWHZXCL@JDYTH-001), the Educational Commission of Jiangxi Province (No. GJJ13069), the Innovation Fund Designated for Graduate Students of Jiangxi Province (No. YC2013-S027), the Hong Kong Scholars Program (No. XJ2012025), the China Post-doctoral Science Foundation funded project (No. 2012T50594, 2014M551866), the Jiangxi Post-doctoral Science Foundation (No. 2014KY11) and Doctoral Fund of Ministry of Education of China (No. 20113601110008).

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Authors and Affiliations

  1. Key Laboratory of Near Net Forming of Jiangxi Province, Nanchang University, Nanchang, 330031, China

    Shuang Shao, Yong Liu, Chun-Shui Xu, Ying-Xuan Xu, Bin Wu, Xiao-Shu Zeng, Xian-Feng Lu & Xiang-Jie Yang

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  1. Shuang Shao
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  2. Yong Liu
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  4. Ying-Xuan Xu
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Correspondence to Yong Liu.

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Shao, S., Liu, Y., Xu, CS. et al. Effects of Cooling Rate and Component on the Microstructure and Mechanical Properties of Mg–Zn–Y Alloys. Acta Metall. Sin. (Engl. Lett.) 28, 7–14 (2015). https://doi.org/10.1007/s40195-014-0140-5

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  • DOI: https://doi.org/10.1007/s40195-014-0140-5

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